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b'Air Force Veteran and mother, Mary Barrett is found beaten and stabbed in the basement of her home. A suspect, "emotional and excited," walks into the Plymouth Borough Police Department to report he killed Barrett. The autopsy determined Mary\'s cause of death to be from blunt force trauma, and the manner of death was a homicide. Who killed Mary Barrett?\\n\\nJoining Nancy Grace today:Angela Sperazza - (Lead Prosecutor), Chief, Major Crimes Division, Luzerne County District Attorneys OfficeDr. Debbie Joffe Ellis - Licensed Psychologist and Mental Health Counselor, Adjunct Professor: Columbia University,\\xa0Author: Rational Emotive Behavior Therapy (2nd Edition) debbiejoffeellis.comKaren L. Smith - Forensic Expert, Lecturer at the University of Florida, Host of Shattered Souls Podcast, @KarensForensicDr. Tim Gallagher - Medical Examiner, State of Florida www.pathcaremed.comJason Campo -\\xa0Chief, Family Violence Unit, Cameron County District Attorney\\u2019s Office, Cameron County Texas, Presenter at Crimes Against Women\\u2019s Conference\\xa0Bob Kalinowski (KAL-IN-OW-SKI) Reporter, The Citizens\\u2019 Voice in Wilkes-Barre, Luzerne County, PA bobkal.com Instagram: @bob_kal Twitter: @cvbobkal'